TPS62100, TPS62101, TPS62102, TPS62103

MULTIMODE LOW POWER BUCK CONVERTER

SLUS446B – MAY 2000 – REVISED DECEMBER 2000

1

POST OFFICE BOX 655303

at Light Loads

and Shutdown Currents

Versions (Maximum 2 MHz)

applications

description

The TPS6210x family of low-power high-efficiency buck converters is designed to operate from 1 or 2 li-ion

cell battery packs. This part, with its wide input range of 2.5 V to 9 V, has an adjustable output from 0.8 V to

8 V and is capable of 500-mA output current. The TPS6210x family of synchronizable dc-to-dc converters is

available in four different operating frequencies: 300 kHz, 600 kHz, 1 MHz, and 2 MHz. The circuit can be

allowed to run at a fixed frequency, or sychronized, using the dual function SD/SYNC input pin.

The TPS6210x family is highly efficient at both low and high output currents. The tri-function MODE input pin

is used to select constant-frequency, auto-mode, or light-load modes of operation. The multimode operation

allows the IC to select the most efficient operating mode, or if desirable, the user can determine which of three

modes to operate in. In the auto-mode, the output load detector circuitry determines if the converter should be

running in the constant-frequency, heavy-load mode, or pulsed-variable frequency, light-load mode.

The TPS6210x family also has a shutdown mode for optimum battery shelf life. The IC utilizes three methods

of overload protection, including thermal shutdown and two levels of overcurrent protection. The TPS6210x is

available in the small outline 8-pin SOIC package.

typical application (automatic mode switcher)

UDG–00059

1

3

2

4

VIN

SD/SYNC

C1

1.0

µ F

MODE

AGND

8

6

7

5

SW

PGND

FB

COMP

+

LI–ION

LI–ION

R2

113 k

Ω

L1

15

µ H

C4

10

µ F

MLC

36 k

Ω

OUT 3.3 V

TPS62102

R4

30 k

Ω

C2

1 n F

D1

10BQ040

R1

1 k

Ω

C3

100 pF

+

0 mA TO 500 mA

R3

Copyright

© 2000, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

1

2

3

4

8

7

6

5

VIN

SD/SYNC

MODE

AGND

SW

PGND

FB

COMP

D PACKAGE

(TOP VIEW)

X